Access, a new key or a hardware problem?
If you are outside and cannot get in, explain the access problem first. If the lock works but you want different keys to operate it, ask about rekeying. If the key, latch or lock is not working smoothly, describe the symptoms before choosing replacement hardware.
These choices can overlap, but they are not interchangeable. Changing a key does not fix a worn latch, and replacing good hardware is not automatically necessary just because you have moved.
Look at the doors you actually use
Think about the front door, side entry and the door between the house and garage. Note which ones use the same key and whether any are difficult to close or lock. There is no need to take the hardware apart.
If you want one key for several locks, mention that goal. The existing hardware needs to be compatible; a list of the doors is a better starting point than an assumption that every lock can be matched.
For tenants and shared entrances
Contact the landlord or property manager before changing hardware where their permission is required. Your apartment door, the main building entrance and a shared garage may be managed separately.
Explain who can authorize the request and whether the building has a preferred process. A private key change should not be treated as permission to alter shared access.
After a move
Set aside the keys and remotes you received, and identify what each one operates. Discuss the private exterior locks before distributing extra keys. Keep shared-entry arrangements and garage remotes on the same move-in checklist, even though they may need different people involved.
For the overhead garage door itself, use the garage repair page. A door that stops or moves unevenly needs its own assessment; a house locksmith request does not describe that whole problem.